High Speed on a LT - BMW Luxury Touring Community
 
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post #1 of 28 Old Aug 9th, 2006, 8:46 pm Thread Starter
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High Speed on a LT

Ok after Killing my GPS. And sending it back to Garmin. I thought ok let see how it does flat out screamin. I am on an 06 with 5700. on her.The speedo says 130 but the GPS says 159 what gives One is wrong but I don't know which I suspect it is the gps.OH yes all you law enforcement people i did'nt say if it was on a closed track or an open road or in my garage. but it was moving.Has any one ever noticed this with there gps .

Jim Giordano
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post #2 of 28 Old Aug 9th, 2006, 8:58 pm
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The 05/06 speedos are known to have a 3 mph error, where they tend to report roughly 3 mph faster than you're actually traveling. This differs greatly from the 8-9% error the pre-05 speedos have. As for the GPS being that far off, most folks trust the GPS before the speedo, but from the numbers you're reporting I'm guessing the GPS is WAY off in this case. I don't know of a single LT with a reliably reported top speed above about 137 mph. Unless, of course, you've added the RBR Turbo Kit.

Anyway, I would contact Garmin and ask them what's up.

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post #3 of 28 Old Aug 9th, 2006, 9:01 pm
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Quote:
Originally Posted by giordiver
Ok after Killing my GPS. And sending it back to Garmin. I thought ok let see how it does flat out screamin. I am on an 06 with 5700. on her.The speedo says 130 but the GPS says 159 what gives One is wrong but I don't know which I suspect it is the gps.OH yes all you law enforcement people i did'nt say if it was on a closed track or an open road or in my garage. but it was moving.Has any one ever noticed this with there gps .
I don't know the conversion formula, butt could the GPS be set for kmph instead of mph?? Or ...... ?
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post #4 of 28 Old Aug 9th, 2006, 9:03 pm
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Quote:
Originally Posted by Dick
I don't know the conversion formula, butt could the GPS be set for kmph instead of mph?? Or ...... ?
1 mile = 1.6 kilometer. Even at that conversion, the GPS would be reporting way too low.

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post #5 of 28 Old Aug 9th, 2006, 9:11 pm
 
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Quote:
Originally Posted by giordiver
The speedo says 130 but the GPS says 159...
Was that the "Max Speed" reading on the GPS, or did you actually read that in real time?

FWIW, the pre-'05s max out at 124mph GPS . . . give or take a mile an hour.
The '05s can get to 131mph. Or so I've been told.
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post #6 of 28 Old Aug 9th, 2006, 10:01 pm
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I am not sure the cause or reason but the gps has at times misread the ground speed, I operate a towboat and downstream with one empty barge top speed is 12 mph. I have had my gps read at over 100mph, I have had it report that my speed was too fast to record. btw I use gps everyday, my car, my bike and my boats. I have 6 gps units, 1 on the bike 2610, have one in the car (toyota) three different ones in my laptop and a magellon i use on my personel boat. I use the laptop at work, also co boat is equipped with gps of its own.

so go figure!

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post #7 of 28 Old Aug 10th, 2006, 12:08 am
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My GPS had a brain fart or something 'cuz after a ride a couple of months ago it read 169 mph for the maximimum speed.

I was so tickled I've kept the reading to "impress" those that don't know any better. When the novelty wears off, I'll go back to zeroing it out before rides.

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post #8 of 28 Old Aug 10th, 2006, 12:27 am
 
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When the GPS is operating correctly, it will only give an accurate speed on a flat, straight road. At least that is what I have read. It apparently only measures lineal distance, not accounting for hills and curves. Under those circumstances, looks like it would always be low though.
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post #9 of 28 Old Aug 10th, 2006, 4:49 am
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Quote:
Originally Posted by tkramer
I was so tickled I've kept the reading to "impress" those that don't know any better. When the novelty wears off, I'll go back to zeroing it out before rides.
Can you imagine if a LEO was to get a glimpse of that just as he was about to give you a warning ticket?

The lady that lives behind us is a Sheriff's Deputy. She takes care of our animals and watches the place when we're gone. Her and her hubby came by one day to drop off the remotes for the gate and gearage on their way to go geocaching. They had some kind of leetle Mickey Mouse GPS, so I let them borrow my Garmin. I handed it to her and then snatched it back real quick. Cleared my top speed and told her if she ever caught me, she better write my ass up. She smiled and said, "Oh, don't worry, hon, I will".



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post #10 of 28 Old Aug 10th, 2006, 5:24 am
 
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Quote:
Originally Posted by grifscoots
Can you imagine if a LEO was to get a glimpse of that just as he was about to give you a warning ticket?

[snip]

Cleared my top speed and told her if she ever caught me, she better write my ass up. She smiled and said, "Oh, don't worry, hon, I will".
For that very reason, I clear my max speed quite often.
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post #11 of 28 Old Aug 10th, 2006, 8:08 am
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Quote:
Originally Posted by Ghost55
When the GPS is operating correctly, it will only give an accurate speed on a flat, straight road. At least that is what I have read. It apparently only measures lineal distance, not accounting for hills and curves. Under those circumstances, looks like it would always be low though.
Interesting. But still: a towboat's GPS reading 100mph? You could do some serious waterskiing behind that thing. Imagine the wake!

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post #12 of 28 Old Aug 10th, 2006, 8:32 am
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lol...I can see the forum posts now if you wiped out behind a 100 mph tow boat while water skiing...

"You should have been wearing a DOT AND Snell certified helmet and full leathers with CE-approved armor..."

"Was there a deer involved?"

"Wouldn't have happened if the boat had non-interlocked ABS..."

"That's why I attached frame sliders to my speedo..."

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post #13 of 28 Old Aug 10th, 2006, 12:11 pm
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Quote:
Originally Posted by DavidTaylor
I don't know of a single LT with a reliably reported top speed above about 137 mph.
140 by GPS on an 02. Long, flat bit of interstate with no cars. Just wanted to see, and having done so, not interested in trying again.

Follow your front wheel...
Steve S.

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If it rolls, floats, flies or shoots, runs on gasoline or gunpowder, is loud, goes fast, or shoots a big bullet, thus producing Torque or Recoil....It's Cool.

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post #14 of 28 Old Aug 10th, 2006, 12:26 pm
 
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Thumbs down 140 on an LT?!

Quote:
Originally Posted by LTsaddledance
140 by GPS on an 02. Long, flat bit of interstate with no cars. Just wanted to see, and having done so, not interested in trying again.
Sorry. I'm not buying it. Nor will the likes of David Shealey, DaveDragon, and so forth. 140 on an incorrect speedo...maybe. 140 on a GPS that's wacking out...maybe. But the pre-'05 LT is incapable of 140mph (actual).
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post #15 of 28 Old Aug 10th, 2006, 3:40 pm
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Quote:
Originally Posted by LTsaddledance
140 by GPS on an 02. Long, flat bit of interstate with no cars. Just wanted to see, and having done so, not interested in trying again.
Had to be downhill, or a heck of a tail wind. No stock pre '05 will do much over 124 on flat highway. SOOOO many of us have tried.

I think even the '05 up, with 15 more HP will only do around 130.

Not long after I got my first LT I was on a long ride with a friend, in NM we opened them up on a long straight, we were side by side at exactly 124 GPS, neither bike would gain an inch on the other one, and we held them that way for a good 2-3 minutes, windshields down and ducked behind them. We were amazed at how closely matched two stock bikes were.

Sure is one smooth bike at speed though! Nothing but wind whistle, no vibration, shaking, etc..

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post #16 of 28 Old Aug 10th, 2006, 6:28 pm
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Usually when a manufacturer lists top speed it is a theoretical top speed calculated by gearing and maximum RPM (redline). Lots of bikes don't have the power to pull redline in top gear - and even if they did - to go faster they would have to exceed redline.

Bruce Hodges
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post #17 of 28 Old Aug 10th, 2006, 7:03 pm
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Quote:
Originally Posted by messenger13
Sorry. I'm not buying it. Nor will the likes of David Shealey, DaveDragon, and so forth. 140 on an incorrect speedo...maybe. 140 on a GPS that's wacking out...maybe. But the pre-'05 LT is incapable of 140mph (actual).
Hey Joe, just reporting what the GPS readout had to say. I don't have any reason to lie about it. Believe it or don't. Call it a glitch in the GPS, call it tailwind, call it swamp gas or a weather balloon

Follow your front wheel...
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2002 BMW K1200LTE (Bayou Buffalo)

If it rolls, floats, flies or shoots, runs on gasoline or gunpowder, is loud, goes fast, or shoots a big bullet, thus producing Torque or Recoil....It's Cool.

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post #18 of 28 Old Aug 10th, 2006, 9:05 pm
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"I think even the '05 up, with 15 more HP will only do around 130."

Thanks for posting that. Now I don't have to find out myself....!
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post #19 of 28 Old Aug 10th, 2006, 9:17 pm
 
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Originally Posted by niel_petersen
Thanks for posting that. Now I don't have to find out myself....!
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post #20 of 28 Old Aug 10th, 2006, 9:32 pm
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Quote:
Originally Posted by messenger13
Sorry. I'm not buying it. Nor will the likes of David Shealey, DaveDragon, and so forth. 140 on an incorrect speedo...maybe. 140 on a GPS that's wacking out...maybe. But the pre-'05 LT is incapable of 140mph (actual).
That is correct, if a stock LT could break the 140 mark I would have done it by now.
The machine will not go that speed without ateration
Period
Rock
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post #21 of 28 Old Aug 10th, 2006, 10:58 pm
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Quote:
Originally Posted by dshealey
Sure is one smooth bike at speed though!
Yep.

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post #22 of 28 Old Aug 11th, 2006, 6:48 pm Thread Starter
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Sorry I was away so I was not able to follow the post.But since have followed it up I thought it was an gps error .The bike and i had an 05 they both top out at 128.5 gps radar less on speedo. But I use to always run gps speed but now i may rethink. I got the H.A.R.D. helment system in vermont rally so lets see if i can avoid getting any ticket. thanks for the input all.jim

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post #23 of 28 Old Aug 12th, 2006, 7:04 pm
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High Speed on the LT

I've found (in the open, with long stretches at a steady speed) that my '99LT speedo reads about 10% higher than the GPS; my van speedo agrees pretty well with the GPS, and the van agrees with the radar speed monitors that are occasionally beside the roads here. (which don't seem to be able to produce a reliable reading for a motorcycle)

The 10% high reading agrees with what many others here have reported, so I believe the GPS is usually accurate.

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post #24 of 28 Old Aug 13th, 2006, 1:47 am
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I figure the GPS is usually accurate, with an occasional anomaly. But the BMW speedo is always off, no matter what speed. I hear the newer bikes are better, but still a bit off. The police/chp models are dead-on.

Actually, my '02 is accurate to within 1 mph of the GPS and those roadside speed warning signs (BTW the ones marked as 35 read fine at about 65 ). I simply opened up the speedo and added/removed jumpers using the procedure found on this board. Now I know exactly how fast I'm going at all times, though I won't often admit to it during those side-of-the-road conversations.

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Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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post #25 of 28 Old Sep 14th, 2006, 7:05 pm
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Brian Staller (drumsbmw) and I did exactly the same thing on our way to CCR Gatlinburg. Shields down, tucked in, bikes loaded for a 2-week trip, both of us with Streetpilot III, identical max speed of 124.

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post #26 of 28 Old Sep 14th, 2006, 8:19 pm
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125 Thats It

Quote:
Originally Posted by LTsaddledance
140 by GPS on an 02. Long, flat bit of interstate with no cars. Just wanted to see, and having done so, not interested in trying again.
Pre 05 Lt's will not go over 125. Here is the proof with the old sp 3.
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post #27 of 28 Old Sep 14th, 2006, 8:25 pm
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All it takes is one signal reflection - off a rock, a vehicle, a passing aircraft, a something - to throw a single point GPS calculation off. From that point on, indicated speeds will be whacked out until that error is dilluted by more accurate data points.

GPS is an instrument. Any instrument has limits. GPS is not always correct.

Now, make a second run, get the same readings again - maybe more trust can be held. But, a one off GPS report using civilian GPS with now secondary data point (DGPS or WAAS)? Na, almost meaningless.

Tate

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post #28 of 28 Old Sep 14th, 2006, 10:25 pm
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Quote:
Originally Posted by tkramer
My GPS had a brain fart or something 'cuz after a ride a couple of months ago it read 169 mph for the maximimum speed.

I was so tickled I've kept the reading to "impress" those that don't know any better. When the novelty wears off, I'll go back to zeroing it out before rides.
I have a 2730 and I have had the max speed on the computer page read as high as 200 Plus. I think it happens when you lose satellite reception for a period of time.

I don't think the real time speed reading is ever off on the gps.
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